Cost of 7 pencils is less than cost of 5 pens by Rs.9. If the cost of 1 pen is Rs 20 ,the cost of one pencil is Rs.
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Step-by-step explanation:
Given total cost of 5 pens and 10 pencil = Rs 30
5 pens + 10 pencils = 30
pens + 2 pencils = 1
also given pen cost 3 more than a pencil
i.e, pen = 3 + pencil.
pen - pencil = 3
pens + 2 pencils = 6
_______________
-3 pencils = -3
pencils = 1
pen - 1 = 3
pen = 4
cost of pencils = 1 cost of pen = 4
Answered by
0
Answer:
Step-by-step explanation:
Given total cost of 5 pens and 10 pencil = Rs 30
5 pens + 10 pencils = 30
pens + 2 pencils = 1
also given pen cost 3 more than a pencil
i.e, pen = 3 + pencil.
pen - pencil = 3
pens + 2 pencils = 6
_______________
-3 pencils = -3
pencils = 1
pen - 1 = 3
pen = 4
cost of pencils = 1 cost of pen = 4
Step-by-step explanation:
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